Oil-burning torch



c. B. JAI-afm. ou. BURNING manu.

APPLICATION FILED NOV. 17. 39|?.

1,377,687, Pam vMay 10, 1921.

STATES TET FMQ.

CHARLES. n. JAHNKL, or BELOI'I, WISCONSIN, AssIeNoR ro rAIRBANks, MORSE a COMrANY, or CHICAGO, ILLINOIS, A CORPORATION OF ILLINoIs.

OIL-BURNING- TORCH.

Specification of Letters Patent. Patmnted jtay M), 1921.-

Applicatioii led. November 17, 1917. Serial No. 202,445.

To all wlw/m t may concern:

' Be it known that I, CHARLES B. JAHNKE, a citizen of the United States, residing at Beloit, in the county of Rock and State of Wisconsin, have invented a certain new and useful Improvement in Oil-Burning Torches, of which the following is a specification.

rlhis invention is an oil burning torch or heater for use in any location where. a hot flame is requiredgfor instance in plumbing and in initially heating the hot tubes of high compression oil engines such as tube 38 in Patent No. 1,159,341, to l-l issued November 2nd, 1915.

The object of the invention is to provide a device for such purposes in which heavy oil can be used, if desired; in which the oil and the air used in its combustion may, one or both, be screened in passing through kthe device; in whichan easily adjustable mechanism is provided for regulating the proportions of oil and air, and consequently the Haine. j

The invention vconsists in mechanism for carrying out the foregoing objects; which can be easily and cheaply made; which is compact and convenientfor use; which is efficient and not readily liable to get out of order. And more particularly in the features and details of construction which will be `hereafter more fully set forth in the specification and` claims.

Referring to the drawings, in which similar numerals indicate the same parts throughout the several views,

Figure 1 is a sectional view of mechanism illustrating this invention in its preferred form.

Fig. 2 is an exterior side view of the device taken from the left of Fig. 1.

Fig. 3 is an exterior plan view of the device, taken on reduced scale showing particularly the details of the stop mechanism for `limiting the rotation of the torch chimney 46. 1

ln the preferred form of the device, the case proper takes the general form of a cross, having two alined arms 10 and 12 intersecting two other corrcspondingarms 14 and 16, and is sustained by any suitable support or handle as, for instance, the pedestal 18. Arm 10 is connected with a suitable oil supply pipe 20, while arm 12 is equipped with a correspondingly located air obart and Jahnke,

supply pipe 22. Extending through the center of arms 14 and 16 is a screw-threaded passageway 26 closed at one end by a stuffing-box mechanism 2S, through which the oil valve rod 30, engaging the screw-threaded walls of passage 26, is adapted to pass in the obvious manner. rlhe user operates this valve by turning handle 31 provided for the purpose. In the opposite end of thisv passage 26 is fitted a screw-threaded plug 32 having through it a relatively large passageway 34 closed yat its inner end by the V- shaped pointed end 36 of rod 30 bearing on the valve seat 38. This valve is of course opened and closed by the operator turning handle 31. The forward end of passage 34 narrows down into a contracted discharge nozzle opening 40 which is in direct alinement with a correspondinglpassage 42 in partition 48, to be hereaftermore fully described.

Adjustable lengthwise of arm 16 heretofore described as, for instance, through the agency of the screw threads 44, is a torch chimney 46 of partly tapered cylindrical form divided intermediate between its ends by the artition 48 provided with passage 42. This partition 48 is so located in the chimney as to form on one side an yair 56 causes the device to act like a standard bunsen, thus completely burning the oil supplied using a minimum quantity of compressed air and making an intense heat.

Upon the outside of a hub 45 on chimney 46 is a ring` 60 adjustably secured in place by screw 62.v Extending-from ring 60 is a finger 64 adapted to selectively engage the outer upper surfaces of cross arms 10 and 12 to limit the rotation and therefore the travel of the `chimney 46 longitudinally of the pipe 16. By adjusting the position of band 60 circumferentially of hub 45, the movement of chimney-46 may be definitely controlled. The object'of thisv adjustment is to vary the distance of surface 70 on the end of member 32 from surface 72 on the 72. If the distance between surfaces 70 Y and 72 is considerable practically no oil will flow from passage 40 for the reason that the pressure of oil and of air are equal.

TheV entire adjustment of the mixturev therefore is controlled by the one adjustment of rotating the chimney 46 on threads 44. The control of the range of movement of chimney 46 with respect to projections 10 and 12 is determined by the adjustable lug 64. In

starting the burner a'mixture comparatively rich in oil is desired,` but yafter the burner has been in operation a short time, it is found desirable to increase the amount of air with respect to the amount of oil and this is accomplished by the Vslight angular rotation of the chimney 46. One Vof the principal objects of the burner is to introduce restricted orifices, which limit the size of the lia-me obtainable, Vthus doing away with the danger of too much heat due to too large an oil supply. The result 'is secured by providing the restricted orifices 40 and 42 with'the limited movement provi-dedffor the burner 46. The construction is also a distinct advantage in that the `hand screw 30 is used for a shut-off only, leaving all of the adjustment of the flame to be accomplished by the slight rotary adjustment of burner 46.

It is the relativev back pressure effort of the air upon the oil, influenced by the resistance olfered in the mixture orifice 42 when the air flow is adjusted that controls the quality of the mixture, Y Y

Arm 10, heretofore described, is bored out to form a relatively VlargeV cylindrical chamber 80 terminating at' its inner end in a smaller cylindrical chamber 82 which, in

- turn, opens at 84v into central passageway with 'intersecting diametrical recesses 100 and longitudinal recesses 102 through which oil or air, as the case may be, must'pass in going from the main chambers 80 or 86 to the burner proper. These passageways just describedare obstructed by cylindrical wire screens 104 suitably mounted upon the outsides of these plugs 94 and 96, as shown. `The result of this construction is that oil entering pipe 20 passes through the adjacent wire screen 104, thence through passageways 84 and 26 to the nozzle opening 40, from which it is forced under pressure through the passage 42 into the chamber 52 of chimney 46 and that air from pipe 22 passes through the wire screen 104, thence through passage 92to chamber 50 from which it isvforced under pressure 'through passage 42 into the chimney 52, the air in so doing passing between surfaces and 72, as heretofore.described. i

In practice, air is supplied in such a way that when it reaches chamber 50 it will be under substantially the same pressure as the pressure .of the oil, which is being forced from pipe 20 through the'nozzle into the chimney 52. One way of accomplishing this, forming no part of this invention and there* fore not illustrated, is to pipe the com 1 pressed air to the top of a small oil reservoir conveniently located for the operator to fill, the oil discharge pipe running to the bottom of Ythis burner chamber, while theV compressed air pipe for the burner is'connected into the top of this tank.

In regular operation the valve 30 is screwed far enough back by handle 31 to prevent any restriction Vat the seat, so that the oil is then free to flow under full pressure upto restricted passage or orifice 40.

Adjustment of the distance or separation between surface 70 and surfacer 72 then allows the correct amount of oil and air to pass through the restricted passage 42. The airA `mixture is provided for while at the other extreme position proper continuous workingk adjustmentis obtained. l

It. is, of course, possible toV reduce the intensity of the blast and heat of the burner Y by controlling the supply of oil by means of valve 30.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is: Y

1. In a burner, a suitable casing havinga Vpassageway provided with a nozzle from whose end combustible-`fuel is adapted to be ejected, a plate over the end of said nozzle provided with a passage through which-oil ejected from the nozzle is adapted'to pass, means for conducting air to a chamber surrounding the nozzle and'bounded in one portion' by said plate so as to admit air to the streamV of oil passing from the nozzle through the opening in the plate, means for varying the distance of the plate from the nozzle to vary the amount of air admitted to the stream of oil, and stop mechanism adapted to limit the movement of the plate in two opposite directions toward `and from the nozzle7 for the purposes set forth.

2. ln a device of the class described, a body member having in its outer portion a relatively large recess terminating inside in a smaller recess leading to a discharge passagevvay, the larger recess being provided With an intake port, a plug insertible in said l larger recess to close its outer end so shaped as to lease an annular chamber in the inside of the larger recess about the plug, said annular chamber communicating With the intake port, said plug being also adapted to fill the inner smaller recess in the case, there being intersecting ports and passageways in the plug through Which material entering the intake port may pass to the exit port, and a tubular screen about said plug and inside said annular chamber controlling material passing through it.

3. In a device of the class described, a case member having a nozzle in the end through Which fuel material may be delivered, a tubular burner device screw-threaded on said case7 and an adjustable finger selectively se` curable to the burner adapted to engage the case to control movement of the burner With reference to the case.

In Witness whereof, l have hereunto subscribed my name in the presence of tvvo Wit nesses.

CHARLES B. JAHNKE. l/Vitnesses FRANKLIN Gr. HOBART, W. C. Aemnnr. 

